Improvement iw grates for furnaces



1. OLD.

Grate for Furnace.

Patente d Oct.11,1875

N- PETERS, PHOTO-EITHC'GRAPNER. WASHINGTON, D. C"

' UNITED S rarrns JAMESO'LD, OF ALLEGHENY, PENNSYLVANIA.

IMPROVEMENT IN GRATZES FOR'FURNACES.

Specification forming part .of Letters Patent No. 168,770, dated October11, 1875; applieati fil d August 23, I875.

To all whom it may concern:

Be it known that I, JAMEs OLD, of Allegheny, in the county of Alleghenyand State of Pennsylvania, have inventedcertain. new and. usefulImprovements 'in Grates for Furnaces, &c.; and-I do hereby declare-thatthe following is a full, clear, and exact description thereof, whichwill enable others skilled in the art to which it pertains to make anduse the same, reference being had to the accompanying drawing, and tothe letters of reference marked thereon, which form a part of thisspecification.

This invention relates to certain improve ments in the construction ofgrates for stoves,

furnaces, open fire-places, 850., the objects of which are to givepassage for the draft to all parts of the fire, to facilitate theshaking of the grate, to regulate the extent of the agitation of thefire, and to enable a double motion to be given to the agitatingbars.

It consists in constructing the grate with rock-shafts provided withcranks, to the wrists of which the ends of the agitating-bars aresecured, so that when vibrated the bars are moved up and down and backand'forth, or up and down alone, according as the crankwrists passthrough slots or holes in the bars. The connection is such that the barsmust follow the movements of the cranks, and thus there is no liabilityof their being thrown from their places. It further consists incombining with the agitating-bars stationary bars, that fill the spaces,and hold the agitating-bars in position.' Lastly, it consists of anarrangement for filling the spaces between the ends of the bars and thewalls of the grate.

In the accompanying drawings forming part of this specification, Figurel is a plan of the grate, showing the bars in position on the shafts.Fig. 2 is a vertical section of the same on line mm. Fig. 3 is a sideelevation of the stationary bar, and Fig. 4 is a top view of the same.

Wrists c of the cranks are passed through these holes or slots, and theagitatingbars are held vertically in their position on the shaftsB B bythe stationary bars E, one of which is placed between eachagitating-barand the next crank, as shown in Fig. 1, thus serving thedouble purpose of holding thebars D in their places, and filling thespace between each of them, serving all the purposes of the'ordinarygrate-bar. The agitating-bars are slightly different in construction and'in operation'.

Those with the round holes D,- Figs. 1 and 5, are shorter than thefire'chamber, and the wrists of the cranks fit them snugly, so that whenthe shafts B B are vibrated these bars receive both anup-and-down and aforward-and-back motion, and in addition these bars connect the twoshafts, so that when one is vibrated the other is acted on simultaneously, making it necessary to operate but one of them directly. On theother hand, the bars D, Figs. 2 and 7, by givingroom for the play ofthecrank-wrist in one direction, are capable of but one motion-i. e., inthe case of the horizontal slot, Fig. 2, the bar D receives only anup-and-down motion, it being prevented from any horizontal movement bythe ends abutting against the end walls of the fire-chamber. In the'caseof the bar with the vertical slot, Fig. 7, it receives onlya horizontalmovement. Either one .or both of the slotted bars D may be used inmaking up the grate with the bars D and E. -It is necessary, however,that one or more of the bars D should be used, in order to connect thetwo shafts, as before mentioned. The short projection e from the shaft13 is designed to fill up the space between the end of the short bars Dthat work back and forth and the walls of the fire-chamber, to preventthe coals from falling through. One of these projections should beplaced on the shaft at each end of the horizontallymoving bars. In placeof them, however, a

flange, f, may be placed on 'the end of the stationary bar E, to effectthe same purpose, or the stationary bar may be made thicker at the ends,so as to fill up the spaces at the ends of'the bars D, or otherhorizontally-moving lz-nr, as indicated in Fig. 6.

It will be observed that this construction and arrangement of thegrate-bars enables a combined up-and-down and back and-forth motion tobe given them, which thoroughly opens up the fire, permitting a freepassage for the draft to all parts of it, andgrinds out the cinders. andashes, freeing the whole sur- 7 face of the bars, and thus prevents thecoal from packing and the ashes and cinders from choking up thedraft-passages.

In constructing the grate the rock-shafts may be supported in the sidewalls of the furnace, as described, or they may be supported on.stationary bars fixed within the chamber. The grate is shaken by aleverin serted in the lug g projecting from the front I rock-shaft B, or, ifpreferred, the end of one or both shafts may project through the wallsof the fire-chamber, and be operated by a wrench or lever.

Where a number of furnaces are employed side by side the end of theshafts may be supported in hearings in a stationary bar placed withinthe fire-chamber, with its ends supported in the end walls, or in anyother suitable position.

The motion of the grate-bars may be increased or diminished by alteringthe lengths of the cranks. and it may also be changed by dropping thejournals lower than the shaft.

What I claim to be new, and desire to secure 3. The projections e, .011the shafts B B, in"

combination with the short bars D and rockshafts, substantially asdescribed. 4. Thecombination of a grate, constructed as described, withthe fire-chamber of a furnace-stove or open fire-place,isubstantially asdescribed.

In testimony that I claim the foregoing as my lown, I have aflixed mysignature in pres ence of two witnesses.

JAMES OLD. Witnesses:

- W. V.DIEHL,

ANDREW HUMBERT.

